By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant industry program in Las Vegas luxury jets are tempting buyers with their smooth shapes, luxurious cabins - and significantly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are eager to display novel forms of aviation fuel deemed less harmful to the environment, from utilized cooking oil to the definitely less attractive meat waste.

Business jet operators, like airlines, have acquiesced environmental pressure on air travel and dedicated to cutting in half carbon emissions by 2050 compared to 2005.

Their hope is that adopting eco-friendly fuel to suppress emissions could make service jets more appealing to ecologically mindful purchasers - particularly corporations facing questions over sustainability from investors or green campaign groups.

The schedule of less polluting private jets might also spare the rich and famous the unfavorable publicity experienced by Britain's Prince Harry and his wife Meghan over a current personal jet journey to southern France.

Five Gulfstream jets on screen in Las Vegas are utilizing California-produced fuel from inedible beef tallow.

The current waste-based fuels consist of "fats, grease and oils that are by-products of the food market," said Bryan Sherbacow, chief industrial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our product is inedible."

Some of the other 79 aircraft on display are expected to be powered by 150,000 gallons of other sustainable fuel mixes expected to be pumped at the show.

FLIGHT SHAMING

Private jets account for less than 0.1% of total annual carbon emissions internationally, however can produce, on average, as much as 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has safeguarded his periodic use of personal jets to guarantee his household's security, and has actually stated that on the rare events he does not fly commercially he offsets his emissions.

But planemakers state events such as the furore over his travel plan have actually included fresh difficulties for a market currently making every effort to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming involving using private jets are unfortunate when you consider that our market has actually delivered fuel effectiveness enhancements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel usage will help the industry make inroads with corporations and rich purchasers. According to market data, billionaires just have a 19% organization jet ownership rate.

But even an image transformation - with jets sporting sticker labels like "this airplane flies on sustainable fuels" and organisers adding alternative fuel pumps for checking out planes - is not likely to please all critics at the Oct 22-24 luxury jet occasion.

Environmentalists and some experts stay skeptical that biojetfuels, typically mixed 50-50 with kerosene, will make a substantial effect on public perceptions about high-end travel.

"No amount of Jatropha or Brazil-nut fuel can make company jets look eco-friendly," said aviation expert Richard Aboulafia.

Demand from service jet operators for sustainable fuels now far goes beyond supply and their interest could drive future production, Sherbacow said.

World Energy, which produces 40 million gallons of biofuel at its California plant, might expand production as much as 150 million gallons by 2022.

Corporate charter companies and consultants are also seeing more interest from clients who desire to purchase carbon credits to offset emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, stated emissions contributed in a business jet utilization study his company just recently finished for a Fortune 500 business.

"At the end of the day, I believe that price, cost per hour, range, speed and performance, that's still the (sales) motorist. But I think individuals are ending up being more mindful of the sustainability of operations and how it affects the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)